| 基于密钥特征点的抗几何攻击图像水印算法 |
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| 引用本文： | 赵培东,谢剑英.基于密钥特征点的抗几何攻击图像水印算法[J].计算机仿真,2008,25(1):158-160,199. |
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| 作者姓名： | 赵培东 谢剑英 |
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| 作者单位： | 上海交通大学自动化系,上海,200030 |
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| 摘 要： | 运用满足函数关系的特征点方法建立源图像的坐标系.源图像移入标准坐标系后,基于小波系数块的统计特性,数字水印自适应地嵌入到小波域,然后嵌入特征点.水印检测时,先检测特征点,重新建立已嵌入水印图像的坐标系作为校准系统.无论源图像遭受旋转、缩放或者平移,已嵌人水印的图像变换到标准坐标系后,将消除所遭受的几何攻击.水印检测是盲检测.仿真实验结果表明所提出方法稳健地抵抗一般攻击和几何攻击.特别是特征点满足依赖于密钥的函数关系,有效抵抗了篡改攻击,解决了特征点不依赖密钥的问题.
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| 关 键 词： | 数字水印 几何攻击 坐标系 统计特性 |
| 文章编号： | 1006-9348（2008）01-0158-03 |
| 收稿时间： | 2006-12-11 |
| 修稿时间： | 2006-12-30 |
Key-Dependency Feature-Based Image Watermarking Against Geometric Attacks |
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| ZHAO Pei-dong,XIE Jian-ying.Key-Dependency Feature-Based Image Watermarking Against Geometric Attacks[J].Computer Simulation,2008,25(1):158-160,199. |
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| Authors: | ZHAO Pei-dong XIE Jian-ying |
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| Affiliation: | ZHAO Pei-dong XIE Jian-ying (Department of Automation,Shanghai Jiaotong University,Shanghai 200030,China) |
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| Abstract: | A coordinate system of the original image is established using the feature points fit for function relation. After the original image is transformed into a new image with the standard coordinate system,a redundant watermark is adaptively embedded in discrete wavelet transform(DWT)domain based on the statistical characteristics of the wavelet coefficient block.Then the feature points are embedded into the image.They are searched before watermark detection.The coordinate system of watermarked image is reestab... |
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| Keywords: | Digital watermark Geometric attacks Coordinate system Statistical characteristics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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